diff options
author | joseph <joseph@7b3dc134-2b1b-0410-93df-9e9f96275f8d> | 2012-05-12 15:44:41 +0000 |
---|---|---|
committer | joseph <joseph@7b3dc134-2b1b-0410-93df-9e9f96275f8d> | 2012-05-12 15:44:41 +0000 |
commit | 62eb53f68d92687a028f3c515489b30e3df1d979 (patch) | |
tree | 7fcf1c95d89caecbbff5d932778f04670c151c52 /libc/sysdeps/ieee754/ldbl-128/e_exp10l.c | |
parent | c29b18b38ccefba22c13b33dd801acba0ae92523 (diff) |
Merge changes between r18392 and r18519 from /fsf/trunk.
git-svn-id: svn://svn.eglibc.org/trunk@18520 7b3dc134-2b1b-0410-93df-9e9f96275f8d
Diffstat (limited to 'libc/sysdeps/ieee754/ldbl-128/e_exp10l.c')
-rw-r--r-- | libc/sysdeps/ieee754/ldbl-128/e_exp10l.c | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/libc/sysdeps/ieee754/ldbl-128/e_exp10l.c b/libc/sysdeps/ieee754/ldbl-128/e_exp10l.c new file mode 100644 index 000000000..503c1de3e --- /dev/null +++ b/libc/sysdeps/ieee754/ldbl-128/e_exp10l.c @@ -0,0 +1,47 @@ +/* Copyright (C) 2012 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#include <math.h> +#include <math_private.h> +#include <float.h> + +static const long double log10_high = 0x2.4d763776aaa2bp0L; +static const long double log10_low = 0x5.ba95b58ae0b4c28a38a3fb3e7698p-60L; + +long double +__ieee754_exp10l (long double arg) +{ + ieee854_long_double_shape_type u; + long double arg_high, arg_low; + long double exp_high, exp_low; + + if (!__finitel (arg)) + return __ieee754_expl (arg); + if (arg < LDBL_MIN_10_EXP - LDBL_DIG - 10) + return LDBL_MIN * LDBL_MIN; + else if (arg > LDBL_MAX_10_EXP + 1) + return LDBL_MAX * LDBL_MAX; + + u.value = arg; + u.parts64.lsw &= 0xfe00000000000000LL; + arg_high = u.value; + arg_low = arg - arg_high; + exp_high = arg_high * log10_high; + exp_low = arg_high * log10_low + arg_low * M_LN10l; + return __ieee754_expl (exp_high) * __ieee754_expl (exp_low); +} +strong_alias (__ieee754_exp10l, __exp10l_finite) |